Typewriting machine



March 24, 1931. VHART f TYPEWRTING MACHINE 3 Sheets-.Sheet l' Filed Nv. 25, 1928 lll l J. r lm A ATTORNEYS t March 24,1 1931. H. J. HART TYPEWRITING MACHINE 5 Shreeis-Sheet 2 Filgd Nov. 23, 1928 BY l .I v MM Mg# ATTORNEYS March 24, 1931. H. J. HART A TYPEWRITING MACHINE Filed Nov'. y23, 1928 3 Sheets-Sheet 3 ATTORNEYS Patented Mar. 24, 19 31 ,UNITED s'rMas Pa'rlatrrA OFFICE HENRY J. HART, OF HARTFORD, CONNECTICUT, ASSIGNOR TOl ROYAL TYPEWRITER COMPANY, INC., OF NEW YORK, Y., A CORPORATION F NEW YORK TYPEWRITING MACHINE,

Application led November 23, 1928. `Serial No. 321,329.

This invention relates to new and useful improvements in typewriting machines generally, although the invention is essentially directed to that type of typewriting ma-` a typewritingr machine embodying a vertically shiftable segment, a plurality of type bars pivoted thereon, a plurality of key levers, and connections between each key lever and the associated type bar which includes.

an intermediate lever and a link connecting the intermediate lever with the type bar. In machines of this type, the platen is supportedl against vertical movement on the main frame of the machine. The type bars in their normal position of rest are disposed in a substantially horizontal plane with their type heads supported by a head rest iiXed to the vertically shiftable segment. Vertically adjustable stops are associated with the segment, such as is disclosed in the co-pending application of George F. Handley, filed October 11, i

1927, Serial No. 225,485, for the purpose of limiting the extreme upper and lowerpositions of the vertically shiftable segment whereby the upper and lower case types on the type bars will cooperate properly with the platen.

It has been found in practice after the stops have been adj usted to center the typewith the printing line of the platen, that inaccuracies in manufacture of the'platen mounting very often result in the link pivot at the upper end of the intermediate lever not being located in a horizontal plane extending between the upper and .lower extreme positions of the pivotal connection between the link and the type bar, and consequently when the segment is shifted, either the type bar will be lifted from its rest position on the head rest, or the key lever will be forced downwardly away from its buier or stop.

It istherefore the principal object of the present invention to avoid the above objections by providing a means whereby the intermediate link may ,be vertically adjusted, and retained in an adjusted postion, so as to insure the point of connection between the link and the type bai1 moving e ual distances above and below the horizontal ine when the segment is shifted to either eXtreme position. Another object of the present invention lies in the provision of a bracket for supporting the intermediate links', vwhichy bracket is mounted on the key lever support for vertical adjustments relative thereto, the bracket and the support having cooperating parts which insure the bracketbeing adjusted bodily in a vertical plane whereby the horizontal plane of the bracket, and consequently the horizontal plane containing the pivots of the'intermediate links, will be maintained in any position of vertical adjustments. A `further object of the invention lies in the provision of positive means for effecting the vertical adjustment of the bracket relative to its support, and also in the provision of means for securing the bracket against vertical movements in any adjusted position thereof.

In the accompanying drawings: Figure 1 is a vertical sectional view taken fore and aft of a typewriting machine embodying the subject matter of my invention, and showing the means for shifting the segment, y, Figure 2 is a similar rview being devoid 'of the segment shifting means, the view however showing the operating means for the esl the means for clamping the ends ofthe brack-f et thereto,

Figure 4 is a view similar to Figure 3 but showing a modied form of guidin the bracket in its vertical adjustment relative to the support, l

Figure 5 is a similar view but showing a further modification, and

Figure 6 is a vertical sectional view showing the modification illustrated in Figure 5.

In the accompanying drawings, I have illustrated only that much of a typewriting machine which is necessary to the full under'- standing of my invention. My invention is illustrated as being applied to a Royal standard typewriting machme, although itwill be use in connection with machines of other types. x

The drawings show a portion of a typewriting machine frame A on which is mounted the usual carriage B having a platen C. The carriage B together with the platen C are supported on the frame A in set position and are not susceptible to vertical adjustment. A segment D is supported on the main frame A of the machine for vertical movements, preferably Lin Vthe manner and by the shift mechanism shown in the Handley co-pendino application SerialNo. 225,485 referred to a ove.

' A plurality of type bars E are each pivoted on the segment D through the medium of a pivot rod 5 which is mounted on thescgment. Each type bar E includes the usual head 6' having upper and lower case characters 7 and 8 respectively, and a heel 9.

The normal or rest position ofthe type bar E is in a horizontal plane, as shown in Figures 1 and 2, and the head 6 is supported by a head rest 10 which is fixed to Aand movable with the segment D.

Associated with eac type bar E is a key lever F, and these k levers are pivoted at their rear ends upon a horizontally disposed and stationary rod 11 mounted in `Va support 12 which is in the nature of a bar which eX- tends across the main frame A and is secured which include an intermediate multiplyingV lever 13. A link 14 is pivotally connected at its lower end to the key lever F and at its upper end to a front link 15 which is pivotedl as at 16 to a cross bar or other support 17 on the main frame of the machine. The front end of the front link 15 is ivotally connected as at 18 to the front end o a long link 19, the rear end of the link'19 being-plvotally connectedas at 20 to the intermediate, lever 13 at a point intermediate the ends thereof. A short link 21 is pivotally connected at its fron-t end as at 22 to the upper end of the intermediate lever 13 and at its rear end as at 23 to the depending heel 9 of the type'bar. The intermediate levers 13 are pivoted at their lower ends upon a horizontal rod or shaft 24 which is mounted lon a bracket 25 connected tothe key lever support 12.

Fixed tothe segment D is a stop 26 which is adapted to cooperate with upper and lower vertically adjustable stops 27 and 28 mounted on the main frame A. The segment stop 26 alternately cooperates with the frame stops 27 and 28 to limit the upward and downwardmovement of the segment. Due to inaccuracies 1n manufacture the horlzontal pos1- tion of the platen C may become slightly with considerable varied, but byv means of the adjustable upper and lower stops 27 and 28, Vthe printing position of the type bar can be adjusted so that the type thereof will be centered relative to the printing line of the platen.

It will be apparent that if, during the otal point 23 moves equidistant from a point downward movement of the segment, the pivabove to a point below the horizontal line .1i-w which contains the pivotal point 22, the type bar E will properly engage the head rest 10 'WithoutI any material pressure thereon, the key lever F will be permitted to remain against .its stop S, and no binding acchine, that is toward the lefta's viewed in Figure'2. This will result in the type bar- E being held at a slight incline so asv to hold Ythe head 6 thereof -out of c'ontactwith the head'rest 10. At the same time this forward movement of the link 21 will tendto move the 'key lever F slightly out of contact `with its stop S.

" Should, however, the pivotal point-23 be moved downwardly for a greater distance below the horizontal line wthan above the .y same, the tendency will be for the link 21 to be moved bodily toward the rear of the ma'- chine, that is, toward the right as viewed in F1gure12. This rearward movement of the link 21 will therefore exert a pressure on the type bar E and cause the -head 6 to be held pressure against the head rest 10.' v

. By mounting the bracket25 for vertical adjustments relative to the key lever support'12, the. pivotal point 22 of the intermediate lever 13 may be readilyadjusted to suit inaccuracies of manufacture and therezontal plane midway between the' extreme upper and lower points of travel of the pivotal connection 23.

Tn carryingout my invention, I have provided the bracket 25 which is of inverted U- shaped construction including a cross bar 29 and depending legs 30, 30. The bracket 25 extendsA transversely of the key'levers F and the cross bar 29 is disposed above the pivoted ends of the key levers. Each leg 30 is formed with a vertical slot 31 and a clamping screw 32 extends through the associated slot and has threaded engagement with the key lever support 12. Thus I have provided a means at` each end of the bracket for mounting said bracket on the key lever support for fixed vertical adjustments whereby the point of connection 23 will be moved equidistant above and below a horizontal lineby the segment D during either of its shifting movements.

It is also desirable to provide means for guiding the bracket 25 in a vertical direction when being adjusted so as to maintain the pivots 24 of the intermediate links in a horizontalplane in any position of vertical adjustment of the bracket. In Figures 3, 4 and 5, I have respectively illustrated three separate means for guiding the bracket 25 during its vertical adjustment. In Figure 3, the key lever support 12 is provided on its rea-r face with vertically disposed grooves 33, 33 for receiving the rear faces of the legs 30,

yof said bracket. The outer faces of the legs 30, 30 are provided with vertically disposed machined faces 34,34 which have sliding engagement with vertically disposed shoulders 35, 35 formed by the outer walls of the grooves 33, 33. The faces 34, 34 have a tight but .slidingfiit with 'the shoulders 35, 35 andconsequently when the bracket 25 is adjusted vertically the cross bar 29 of the bracket will be maintained in `a horizontal plane.

In the form illustrated in Figure 4, the legs 30, 30 of the bracket 25 are guided vertically relative to the key lever support -12 through the medium of vertically disposed keys 36.

In the form illustrated in Figure 5, the legs 30, 30 of the bracket 25 are each provided with a rearwardly extending seat 37 for receiving a guide pin 38 carried by the key lever support 12. In this form, I have also provided means at each end of the bracket 25 for positively adjusting said bracket vertically in either direction. To this end, the bracket 25, as shown in Figure, is provided at each end with a forwardly extending arm 39 which underlies the key leverJ support 12. An adjusting screw 40 is rotatably supported in the arm 39, and the upper end of this screw has threaded engagement with the support 12. Thus in the form illustrated in Figures 5 and 6, the bracket 25 may be readi ily adjusted vertically in either direction by first loosening the clamping screws 32, 32 and then turning the adjusting screw40 in the proper direction. Of course after the proper adjustment has been effected the clamping screws 32, 32 are turned to their clamping positions so as to maintain the bracket 25 against vertical movement in its adjusted posltion. i v

In order to provide means forshifting the segment D, I prefer to employ a mechanism which is disclosed in the Handley application Serial No. 225,485 referred to above, although, of course, other shiftingl mechanism may be employed if desired.

I have illustrated in Figure 1 of the present drawings, the segment shifting mechanism disclosed in the above mentioned Handley application, and therefore a brief description will be sufficient for an u'nderstanding thereof.` A ke shift lever 41 ismounted on ashaft 42 carried by they main frame of the machine and includes an upstanding arm 43. A bell crank lever 44 is pivoted as at 45 on the arm 43. One arm 46 of the bell crank lever is pivotally connected to one end of a link 47, the other end of said link beingpivotally connected to a latch 48at a point above its fulcrumv 49. Also connected to the arm 46 of the-bell crank lever 44 is a connection, indicated as a whole at 50, which extends rearwardly and has a loose. connection generally indicated at 51 with anarm 52 fixed to a rock shaft 53 mounted on the main frame -of the machine. Also fixed on the rock shaft is a forwardly extending rock arm 54 to the forward end of which is pivotally connected an upwardly extending link 55, the upper end of the link being pivotally connected to the segment D. A spring 56is connected at one end to an arm on the rock shaft 53 and has its other end adapted to be adjustably connected to the main frame of the machine. The spring 56 functions to return the segment D from lower position to upper position. A latch 57 is mounted on the same axis 49 as the latch 48, but extends below said axis to form a depending arm to which is connected one end of a link 58, the other end of the link being pivotally con- 60. The above description is suficient to disclose key operated means for shifting the segment D vertically. l

The segment D is normally held in its upper position through the medium of the latch 48 engaging the segment stop 26. At this time, the latch 57 is disposed forwardly of the sto 26 as shown in Figure 1. Upon depression of the shift key lever 41, the latch 48 will be first disengaged from the stop 26 and. the segment D will be lowered against the tension of the spring 56. Upon release of the shift key 41, the segment will be returned to its upper position by means of the spring 56. Should it be desired to lock thev segment Ain its'lower position, the shift lock key 60 is depressed which ,will cooperate with the shift key 41 and lower the segment against the tensionof the spring 5,6, and after the segment has reached its lower limit, the latch 57 will engagev over the segment stop 26 and thereby retain the segment against upward movement until the shift lock key 60- has been released.

'105 nected to an arm 59 of a shift lock' key lever l I claim: l

1. In a typewriting machine, the combina! tion with a vertically shiftable segment, of a key lever, a type bar pivoted on `said segment, connections between the key lever and type bar including an intermediate lever, and

-links respectively connecting the intermediate lever and the key lever and the intermediate lever and the type bar, and means support disposed in front of and in a planey below the segment, a plurality ofkey levers yterinediate lever and the type bar, a bracket fulcrumed on said support, a plurality of type bars pivoted on said' segment, connections between the-respective key levers and type bars including an intermediate lever, and links respectively connecting the intermediate lever and the key lever and the inon which said intermediate levers are Afulcrumed, and means for mounting said brack' et on said key lever support for fixed vertical adjustments whereby -the points of connection between the last mentioned links and the type bars will be moved equidistant above i and below a horizontal line by the segment during its shifting movement.

3.' In a typewriting machine, the combination with a vertically shiftable segment; of a support disposed in front of andin a plane lbelow the segment, a plurality of key leve'rs fulcrumed'on said support, a-plurality of type bars pivoted on said segment, connectionslbetween the respective key levers and type bars including an intermediate lever, and links respectively connecting'the lntermediate lever and the key lever and the inter, mediate lever and the type bar, a bracket oii whichsaid intermediate levers are iul-p crumed, and means for mounting said bracket on said key lever support -for fixed vertical adjustmentsl whereby the points of connection between the last mentioned links and the type bars will be moved equidistant above and below a horizontal line by the segment during its shifting movement, said means including cooperating guiding means between the support -and bracket for guiding the bracket in a straight line during vertical 'ad-y justment.

lever, and links respectivelyI connectin the A above the pivot ends of the key levers, and

cooperating means between the legs of the ,bracket and the support for retaining the bracket in a fixed and vertically adj usted po' sition relative to the support whereby the points of connection between the last mentioned links and the type bars will be moved equidistant above and below a horizontal line Vby the segment during its shifting movement. U

5.vv In a typewriting machine, the combination w'ith a vertically shiftable segment, of a'support disposed in front of and 1n a plane below the segment, a pluralit of key levers fulcruined on said support, a pl'urality of typebars pivoted on said segment, connections between the respective key leversandtype` bars includingv an intermediate lever, and links respectively connecting the intermediate lever and the key lever and the intermediate lever and the type bar, an-'inverted U-shaped .bracket extending transversely of and disposed in rear of the key levers and including a cross bar on which the intermediate levers are fulcrumed and` depending legs, "saidb legs being respectively formed with vertically disposed slots, and clamping screws extending through said slots and engaging the support to retain the bracketin a vertically adjusted position wherebyl the points of connectionbetween the last mentioned 4 links and the type bars will be moved equidistant 'above and below a horizontal line by the segment during its shifting movement.

6. In a typewriting machine, the combination with a vertically shitable segment, of a supportdisposed ilrfront of and in -a' plane below the segment, a plurality of key levers fulcrumed on said support, a plurality .of type'bars pivoted on said se ent, connections between the respective ey levers and type bars including an intermediate lever, and links respectively connecting the intermediate lever and the key lever and the interv media e lever and the type bar, an` inverted U-shap d bracketI extending transversely of and disposed in rear of the key levers and including a cross bar on which the intermediate levers are lcrumed and depending legs, the

4. In a typewriting machine, the combifibss bar being disposed above the pivot ends nation with a vertically shiftable segment, of afsupport disposed in front of and in a plane below the segment, a plurality of key levers fulcrumed on said support,/\a plurality of typebars pivoted on said seginent, connections .between the respective key levers and type bars including an intermediate `of the key levers, and cooperating means between the legs of the bracket and the supp01i for retaining the bracket ina fixed and vertically adjusted position relative to the support whereby the points of connection between the last mentionedylinks and the type l bars will be moved equidistant above and below a horizontal line by the segment during its shifting movement, said means including cooperating guiding means between the support and bracket for guiding the bracket in a straight line during vertical adjustment.

7; n a typewriting machine, the combination with a vertically shiftable segment, of a key lever, a type bar pivoted on said segment, connections between the key lever and type bar including an intermediate lever, and links-respectively connecting the intermediate lever and the key lever and the intermediate lever and the type'bar, means for supportin said intermediate lever for fixed vertical a justments whereby the .point of connection between the last mentioned link and the type bar will be moved equidistant above and ment during its shifting movement, and

zoimeans for adjusting said supporting means termediate lever and thet vertically.

8. In a typewriting machine, the combination with a vertically shiftable segment, of a su port disposed in front of and in a plane be ow the segment, a plurality of key levers ulcrumed on said support, a plurality' of type bars pivoted on said segment, connections between the respective key levers and type bars including an intermediate lever," 'and links respectively connecting the intermediate lever and the key lever and the ine bar, means for supporting said intermedlate levers on said key lever su port for xed vertical adjustments where y the points of connection between the last mentioned links and the type bars will be moved equidistant above and below a horizontal line by the segment during its shiftingzmovement, and means cooperating with said ey lever support for vertically adjusting the support of the intermediatelevers. v

9. In a typewriting machine, the combination witha vertically shiftable segment, of a support disposed in front of and in a plane be ow the segment a pluralityof key levers fulcrumed on said support, a plurality of t pe bars pivoted on said se ent, connections between the respective ey levers and type bars including an intermediate lever, andlinks respectively connecting the intermediate lever and the key lever and the intermediate lever and the type bar, a bracket on which said intermediate leversare fulcrumed, means for mounting said bracket on said key lever support for xed vertical ad- 'ustments whereby the points of connection tween the last mentioned links and the type bars will be moved equidistant above and below a horizontal line by the segment duringits shifting movement,and means carried by the bracket and cooperating with the key lever support for vertically adjusting said bracket.

10. In a. typev ting machine, the combi.-

of type barspivoted on sai elow a horizontal line bythe seg` plane below the segment, a plurality of key levers fulcrumed on said suport, a plurality segment, connections between the respective key levers and type bars including an intermediate lever, and links respectively connectin the intermediate lever and the key lever an` the intermediate lever and the type bar, a bracket on whichisaid intermediate levers are fulcrumed,means for vertically adjusting said bracket whereby the points of connections between the last mentioned links and the type bars will be moved equidistant above and below a horizontal line by the segment during its shifting movement, and means for retaining said bracket against movement inan adjusted position.l Y

, 11. In a typewriting machine, the combi- -nation with a vertically shiftable segment, of a support disposed in front of and in a plane below the. segment, a plurality of key evers fulcrumed on said (support, a plurality` of type bars ivoted on said segment, connections etween theV respective key levers and type bars including an intermediate lever, and links respectively connecting the intermediate lever and the key lever and the intermediate lever and the type bar, a bracket on which said intermediate levers are fulcrumed and extending transversely ofsaid key levers, means at each end v of the bracket and cooperating with the key lever support for adjusting said bracket whereby the points of connection between the last mentioned f links and the type bars will be moved equidistant above and below a horizontal lineby the segment during its shitin movement, and means for retainin sai bracket against movement 1n an a j-usted position.

In testimony subscribed my name.

Hanni? J. HART.

whereof, I have `hereunto 

